# Relationship history for MSHA mine 4500822

Current hierarchy: **Asamera Resources Inc → Asamera Minerals (Us) Inc → Wenatchee Silica Products Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Asamera Resources Inc → Wenatchee Silica Products Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wenatchee Silica Products Inc → Wenatchee Silica Products Inc; 1950-01-01 to 1984-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Truswell Byron W → Wenatchee Silica Products Inc; 1950-01-01 to 1984-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Truswell Byron W → Wenatchee Silica Products Inc; 1950-01-01 to 1984-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Asamera Minerals (Us) Inc → Wenatchee Silica Products Inc; 1984-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asamera Resources Inc → Asamera Minerals (Us) Inc; 1984-09-15 to current/open; source msha-controller-operator-history